Pneumatic-tool handle.



W. 0` DUNTLEY.

PNEUMATIG TOOL HANDLE.

PPLIOATIoN FILED MAR. 1o, 1908.

Patented Feb. 16, 1909.

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629i h1 man lil OFFICE.

WILLIAM O. DUNTLEY, Ol" GllCAGt), ILLINOIS,-ASSIGOR TO CHICAGO PNEUMATIC TOOL COMPANY, OF CHICAGO, ILLINOIS,

A CORPORATION OF NEW JERSEY.

PnfaUMArIc-'rooL HANDLE.'

Specification o' Letters Patent.

Patented Feb. 16, 1909.

To all whom it may' concern.'

Be it known that l, iViLLrtu t). Donr- LEY, a citizen ot' the United States, residing; at Chicago. county of Cook, tltate of lilinois, have invented a new and useful Pneumaticllool Handle, of which the following;l is a specification.

'llhe pi'ieumatic tool handles ot' the present day which are in practical use are, for the most part, provided with a throttle valve located `in or partly in the grasping portion ot the handle and said valve is actuated by means either oit a thumb pressed lever pivotally mounted in a narrony slit in tlicont v side of the handle or clac by a linger latch pivotally mounted in the interior of tho hali'idlo, .suitable nctuatir-.gl or connecting nicchauisni beingr interposed between the thumb or tinojcr operated lover and the throttleI valve. While these devices give a certain degree ot' satisfaction so far aS' their opcratirene4 is concerned, it has nevertheless, happened iu main' instances, that pneumatic hamn ci" this general character which are oil n .subjected to much abuse and neglect and au lett lying' on thefloors of the planta where they are in use, have fretniently been :u'tzitloutally started by the .workunin or attendant accidentally l'iitting' the manually opt-rated lever with his fQQt or other portion ol' his body in which case if air pressure lutti-pons' to he on the tool the pistou will continent-e its rcciprocati'ons with great rapidity thereby .sometimes causing either the pistou itself to shoot out with almost. thc volet-,ity of a rillo bullet or the reciprocation ot the. piston may cause the chisel, button set. or other implement or Working tool to be propelled from the cylinder thereby inllit-iiugj serious injury to any person or object in the vicinity lnasmue as the. pistons of these pneumatic hammers, as is Well lino'tru to those skilled in the art, reciprocate a high velocity ranging from six or seven hundred to twelve hundred Strokes a n'iinuto under pressure of eighty to one inindred and teu pounds to the square inch, can he irnlily seen that there isl Igreat liability ci ions injury or damage in case the operation of one of these ini-- plements accidontdly cruised.

ln order to o Ane the above disadvantages .l have devised a nneiunatic tool handle which can` be very cheaply manufactured `and assembled and 'wherein the parte are all seltcontained and wherein the operation of the throttle valve and' its reciprocation from the handle of the pistn is eliected by a slight rotation of the grasping handle proper, the throttle valve being located wholly outside not only the grasping portion of the handle but the handle as Well and being` mounted on a suitable portion of the tool body which is specially fashined to receive it. I also connect the inletfor the motive fluid directly to the tool body and make provision whereby the opening of l the throttle valve can be readily and inl stantly varied or increased or diminished by a very slight movement of the Workmans Wrist.'

In my novel construction of handle there is no manually operated thumb lever or inside finger latch which can be accidentally operated since all the parts are Self-con tained and there is no liability of dust, dirt, sand or grit entering or obtaining access to any ot the working parte of the handle or throttle valve.

To the above ends my invention consists rane haring a tension device therefor in having,` ay rotatable grasping member and suitable mechanism intermediate said grasping member and throttle valve, whereby the latter can be readily opened and closed .according to requirements, -said throttle valve and its adjuncts being Wholly located out ot' not only the gfia'sping` part ot' the handle but the handle .as well and ,being located in a chamber or recess in the tool body.

It further consists of a novel construction oi a rotary grasping handle having a ca'm surface therein` a throttle valve located outside of the handle and suitable mechanism intermediate said cam surface and throttle latter.

It further consists' o l novel features of coiistructioin all as will be hereinafter fully Het forth. n

lt`or the iurpose ot' illustrating my invention` l hare. shown in the accompanying cnt preferred by me, since thc saine has been found in practice to give satisfactory and rcliable results, although it is to be understood that the various instrunlcntalities ot' 'which my invention consists can be variously areombinatiou with a pneumatic tool handle.

dra wings one lorm thereof which is at presbroadly of a novel Construction of throttle valve -for effecting the reciprocations of the .through tile' ports 9 of ille bashing device, rotatably mounted .on :Elle lill ranged alltl organized and that my invention l is not limited to the precise construction and organization of these instrlllnentalities as herein shown and described.

Figure l represents a longitudinal seetional View of a pneumatic lool handle and its adjunets embodying my imlention,4 eel-- tain of the parte being shown in elevation. Fig. 2 represents, on all enlarged Scale. a seetierl on line r/. m, Fig. l. Fig. 3 represente an end View of Fie. l, the handle and its adjuncts being cletaelled from the cylinder. y

Similar numerals of reference indicate eorrespozltlino parte in the figures.

Referring to the drawings: l designates the cylinder of a pneumatic tool7 the Same being provide-fi with the lining 2, nosillg 3, button set el, and piston and the other usual adjunets. 'l'le cylinder l is provided With the enlargement 6 preferably integral therewith, Within which is contained tile Valve box, and distribntien valve (not Siler/nl. v

if' designates a threaded inlet or boss for tile attachment thereto of tile air supplyt lios@ (not shown), ille lnotie finiti passing irte the annular ella. lllel 8 anti 'tllenee l0 into tile main air inlet l1 to tlle Working pal-ls. ot' the tool. assuming that the throttle valve 12 il; open as will be explained. The throttle l 'e eensists of the head ol' valve ploperl ller/lng tile zie-ela .1.3 which is attached 'to the neacl tile latter haring tile rounded or tente): extremity l5, against which Contacts the end of tile sleln 16, which extends longitnclil'lally in the arm l?, which may ne illtegral with or suitably secured to tlle valve easing 18, within wlliell tile bushing l0 and valve l2 are contained. Tile stem lll prevented from ill'lpl'opel turning` or shifting by the engagelllent ol ille inner end oi tile pill il) with ille walls (if the groove. 2O as will be Hatley-telai from lfige.. l and 'i designates :l roller or other an wllicll is seelll'efl neatl tile ellff. said roller beingadapted lo bear ean'l 'facil 023 ot' llle ilanlllf: wl l .'lflllelllil'v "l is .stepped ol otllerollee rota lallljvV seein-elfi in illeexlrmlliiiyY oi ille arlll l? allll llelcl in proper position by ille (liek Wlliell in threalletllll olller engagement with sail-l oxlrelllity lle latter anti said disk being concealed by lille plate 9.7. Tile upper extlellliiy Q of tile rotatable llanie inem-bel' @l is rotatably lllolmted in tile emi Q9 ot' ille llal 30. wlliell is movably lllotllltefl on 'lille pill ear-riedlly tile 32 attaellell to or integral 'with tile cylil fier portion 5.

ltlesignates' a Clisi: secnl 't0 tlfle end 28. si' the llanflle and having also secured 'to tile opper end el lle ed 3ft, said die, also ila-ving one. or" tl spring eecurefll vconducted illtollle inlet T ille operator graso- @legale thereto, tile lower enti of Said Spring; being' seellretl 'to the lleatl 5T, tile latter' anni elli( spring being contained in tile chamber 38, willie tlle lower Ar-llll of saicl roel ma" it de sired. exlelltl l'lll'oilgil l'lle lower enti] of tile handle 2l. the eileet olf the iension of 'the Spring' lll being lo llol'll'lalllY retain tile pmi 23 ill tile position :wen ill lligs. l and 2l as it will be apparent that tlle spring S6 lf perate A with the spring ISU, which is contained in the valve ellalllller il), one end of said latler spring' lilo'lltacting willi tile lleatl. l2., @nil its other end abutting again t tile plate-1&3. having' llle port tl'lel illro'llg'll.

y'file operation is as follow" parts are in their nor'nlai poeitil ill l1`igs. l anti 2 il will be a' parent that lleall or throttle, valve l2 is llelll in. lially llleposition ellown til-rough till-t lillnl of lille spring 3U n'fl'll'el'l causes the friction device 2l to seat substantially ille-ated ill 2, the 'proper position of grasping llallrlle 2v being assured by l oi tile vspring 3G. '"lle motive limiti ll e portion :El oi' alle handle and lll-ving pliell the working` tool as d?, wllien may '0e a, llllltoll all. ellieel blank, or otllel' illlplement, l, l ille lll-tired point, il. -will lle al; *et tf ll if a :iiigllt 1ra llly lnllvelllellf is L parted .L

ille lllelllller ll that. the Contact ell tile anti friction device 2l wilil ille ealll surfnet.

` nieve to will Cause l'lle \'al\'e .l2 to atlval 'z ille leit.y lllerellyperllnttlng tile motive llltl :o enter tlll'oue'll tlleport italici flow peet neel: .lil allll lllellee l'llramgll 'ine nlanl ll. e 1l te ille work parte et lille tool.

extent. tllll :llllolzni of lllotive finit?. ente llle l ll inlet pl'lrt ll can be incl" l l'lilllilli 'sell ol' otherwise rejnlflteli #lecon In lo leqail'elllent. lllllel'l tile opera-ter release. llif,l glimp upon tile lotata'e e l'llelnlel l- 'tile torsional action of tllejspling couple@ will tile tellszioll el' tlle spring 39 will @anse ll ille parte to instantly eeslnlle 'ille 'posilen seen in Figs. l :lllll as will lie evifient to 'those skilled ill tlle ari Through the rnetlil'ln ol' lle pill i9 and ite eoeetioa with walls of the slot 2l) in tile Stem lil: tl'le lett a will lle prevented 'from inlpreperturnier li by mailing' tile sill-face l5 "it" l I Sllaglfll as indicated in i .a

lle apparent lllal tile lon`v anilla of ille ill'olle valve will lle nil l2@ and that ille ieli'ln Stein lli .disk 33, the arin can be elevated from the position seen in Fig. 1 and upon the removal of the disk Al1 and the springBQ the throttle valve and its stem 16 can be readily moved to theA left whereupon the rotatable member 24 can be quickly and expeditiously disengagged' from the arm 17.

If desired, it ivill be apparent that l can make the :iini 1T integral with the enlargement. or body portion (i ot' the cylinder 1 and that various other changes can be made by those skilled in the art which ivill fall Within the scope ot' my invention and I do not there` foi-e, desire to be limited in every instance to the exact. construction l have herein shown and described, since many changes may be made by those skilled in the' art without departing from the scope and spirit ot my invention.

So tai-.ais I ani aware I am the first in the art ltoproduce a concrete iinitaryistructure having the advantages and charaeteristlcs Sponding scope.

.It will be apparent that my novel con-A i. struction of handle is applicable'to any torni .of" piieiimatic hammering implement irre- .spctiveot whether the same 1s of the valvelesstype or employs a distribution valve and that the, handle will Work with equal eiii.

ciency with the so-called long strokeriveters in nso at the present time or in conjunction with the 'shorter stroke chipping or calkinq .hammer or hammer adapted for stone wor t as my invention is not limited in its applicationl but may be employed to advantageY with any of the pneumatic` hammering tools which are adapted to any of the purposes for whicha hammer or mallet andchisel Having thus described inyiinvention, what I claim as new and desire to secure by Let- A ters Patent, is

. arms, mechanismliuteriuediatc Iaid rota.

1. The combination of a pneumatic tool, a handle therefor, a. rotatable 'grasping niember carried by`said handle, a throttle valve located Wholly exteriorto said handle and grasping portion, cam mechanism intermediate said throttle valve and rotatable member, whereby the rotation of said member otl'ects the actuation of saidthrottle valve in one direction, and yielding` means for effecting the movement of said.throttle valve in a reverse direction.

2. The combination of a pneumatic tool cylinder, a throttle valve carried in said cylinder, arms attached to said cylinder one of said arms being' pivoted thereto, a rotatable grasping handicmember mounted in said tableineniliei' and throttle vulve for eil'ecl ing zineinber, a throttle valve, a tension device therefor, and mechanism intermediate said valve and cani facefor effecting the opening and closing of said valve.

i. Thecoinbination of a pneumatic tool havingl a cylinder provided with a. throttle valve chamber therein, said chamber having an inlet for the motive iiuid leading thereinto, arms attached to saidoylinder, a grasp ing handle portion, a cain on said portion, u. throttle valve mounted in said valve chamber, a valve stem intermediate saidwthrottle valve and cam face and yielding' means, for maintaining` said stem in operating relation with respect to said cuni.

,5. The combination of a pneumatic' tool having a cylinder providedwith a'fthrottle valve vchamber therein, a "raspng handle rotatably mounted upon sai cylinder, a cam face on said grasping handle, .a throttle valve in Said valve chamber, a valve stem intermediate said valve and cuni face, .means ior preventing said valve stein from turning, and yielding means co-acting the said valve for maintaining the latter normally in inoperative position.

cam, and an anti-friction device carried by said. stein and contacting withI said cam, the sui-'tace 4of said valve juxtaposed to said stein being convex. y

8. 'A pneumatic tool handlehaving a rotatable g 'asping member forming the grasping,r portion of the handle, a cam face on sind ineinher, a throttle valve located wholly outl sido said handle and g'as ing member, a tension device for said vavo, and a stem intermediate said valve and cani face.

' 9. A pneunmtic tool handle havin? a ro ity o tatable grasping' member, a plura aiins iu the `ends of which said rotatable iueinber is mounted, a throttle valve ylocated wholly exterior to said handle and grasping poi-tion, tcnsiondevices tor lsaid rotatable member and throttle valve, and mechanism intermediate said rotatable member and .throttle valve for actuating the latter.

10. .fi pneumatic tool handle lhaving a rotatable grasping' member, a tension device carried by said member for i-ior`m`allyrotating it into ino ierative positio'ifi,y a throttle valve, a'spi'ing )caring.thereoiland mechanism intermediate said rotatable member, and valve for actuating the latter.

11. A pneumatic tool handle having a rotatable grasping member, a tension device located Within said member for normally retaining it in inoperative position, when the grasp of the operator is removed therefrom, a throttle valve and mechanism intermediate said rotatable member and valve for operating the latter.

l2. The combination v'of a pneumatic tool..

cylinder, a throttle valve chamber carried by said cylinder, and having an inlet tor the motive iuid leading thereinto, a bushing in V said valve chamber, a throttle valve located in said bushing, a tension .device for said throttle valve, arms carried by said cylinder, a grasping handle member rotatably mounted in said arms, acam surface on said rotatable grasping member, 'a valvestem located intermediately of said cam surface and throttle valve, means for' preventing said valve stem from rotating, and a tension device for effecting the. rotation of said grasp.-

. ing handle member, when the hand of the- A. Y .device in one end adapted to be rotated by 'said cam surface, a throttle valve composed of a plurality of heads joined by a neck, the`4 extremity of said head which is yjuxtaposed to said valve stem being convexfand a pneumatic tool cylinder l having a chamber formed therein for the reception of said throttle valve, said chamber having also an inletfor the motive uid supply.

14. In a pneumatic' tood handle, a rotatable grasping member, arms in which said rasping member is rotatably mountedga ongltudinally extending recess v1n said graspin member, a rod located in said recess, a c osure for the upper end of said -recess, a spring having one end secured to said closure, andr the other end to said stem, whereby the rotation of said handle is effected, a cam surface on the lower portion of said rotatablemember, avalve stem suitably supported and having an antifriction device in one end adapted to be actuated by said cam.. surface, a throttle valve com osed of 'a plurality of heads joined by a nec the extremity of said head which is juxtaposed to said valve stem being convex, and avpneumatic tool cylinder having a chamber .formed therein for the reception' of said valve, said chamber having also an inlet for the motive fluid supply, ing pivotally attached to said tool cylinder.

15. A pneumatic tool handle having a rotatable grasping member, a throttle valve in one of said arms be- I the tool cylinder located VWholly outside of' said handle and grasping ortion, and mechanism including an anti-4 rictiondevice in-g termediate said .rotatable member and throttle valve ltor operating the latter when said member is rotated.

16. The combination oi a pneumatic tool cylinder, a throttle .valve chamber carried vby said cylinder and having' an inlet for the motive fluid therinto, a throttle valve in said chamber7 a tension device for said throttlc valve, arms carried by said cylinder, cue of said arms bein secured to satdcylinder, agraspinghan le member rotatably mounted in said arms, a cam surface on said member, a valve stem located intermediately of said cam surface and throttlelvalve, vand yielding means'for maintaining said handle'` member in normal positiono WILLIAM o. nUNTLErf `Witnesses A-, L. MURPHY,

W. e. sm 

